I'm trying to get my 100 that I bought a couple of years ago running right. It starts and runs well but after it warms up a few minutes it smokes like crazy. I can't tell by the color of the smoke but its not black. I tried uploading a picture and all I could get is a link that no one would be able to open. It wasn't running when I got it as it was missing the radiator and I think based on the grill someone hit it. While waiting for a radiator I had the head gone through by a engine shop and put in new rings. It has smoked badly from day 1. If its not black smoke can it be water leaking into a cylinder once it heats up a bit? It currently only has water in the radiator, no antifreeze. What color would the smoke be if it were burning oil somehow. Holding a paper to the exhaust doesn't come out oily. I'm thinking the head will have to come off again but would like to have some idea what I'm looking for before taking it apart.